Update proto generation

[vmanilo]

When using latest proto plugins:
google.golang.org/protobuf/cmd/protoc-gen-go@v1.26
google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.1

protoc --version
libprotoc 3.17.0

getting error:
--go_out: protoc-gen-go: plugins are not supported; use 'protoc --go-grpc_out=...' to generate gRPC

This changes fix proto generation issue.

[hashicorp-cla]

All committers have signed the CLA.

[briancain]

Hey there @vmanilo - Currently, main Waypoint isn't on the latest versions of the proto plugins so for those pinned to older versions, this would break. I'm going to keep this open for now for reference if people wish to use the latest versions. We have some plans on how to make this proto gen better which should hopefully solve this version difference issue 😅

[christophermancini]

I was able to generate the protos with even simpler commands:

	protoc -I . --go-grpc_out=. --go-grpc_opt=paths=source_relative ./builder/output.proto
	protoc -I . --go-grpc_out=. --go-grpc_opt=paths=source_relative ./registry/output.proto
	protoc -I . --go-grpc_out=. --go-grpc_opt=paths=source_relative ./platform/output.proto
	protoc -I . --go-grpc_out=. --go-grpc_opt=paths=source_relative ./release/output.proto

version of the plugin protoc-gen-go-grpc 1.2.0